Separation of positive and negative muons in a giant shower by the geomagnetic field

The separation of positive and negative muons in a giant shower by the geomagnetic field is observed at a very high level of significance 0.03%. This result is obtained by interpreting in terms of the quark-gluon string model the indications of all detector stations that were triggered in this shower (which was detected at the Yakutsk array) on the basis of calculations of the responses of these stations both with and without taking the Earth's magnetic field into account. (C) 1998 American Institute of Physics.